Refrigerating apparatus



June 7,1927.

A. T. STOCK REFRIGERATING APPARATUS 2 Sheets-Sheet 1 Filed July 26, 1926 June 7,1927.- 1,631,345

A. T. STOCK REFRIGERATING APPARATUS Filed July 26, 1926 z sums-sheet 2 :latnte'd June 7, 1927.. I UNIT I STA D AYTON, OHIO, A CORPORATION: OF DELAWARE.

'mirnrennn'rmenrrnaarus.

Application filed July as,

The present invention relates torefrigerating apparatus, and particularly to ap paratus in which the refrigerant condenser is cooled by water.

One of the objects of the present inventionis to reduce the cost of operating. a refrigerating. apparatus bycontrolling the flow ofwater for condensing purposes in a mannersuch that the water begins to flow when the .demand for water arises and stops flowingprom t-ly after the demand ceases.

Further ob ects of the present invention 1 will be apparent from the following description, reference being had to'the accompanying drawings, wherein a preferred form of the present invention is clearly shown. Inthe drawings:

Fig. 1 is a-diagrammatic viewof a refrigcrating apparatus includingia water-cooled view taken on line .pose of illustrating the present invention there is disclosed a compression,condensing and expansion type refrigerating apparatus which includes, chiefly, a cooling unit or evaporator 20, a compressor'21, a. driving motor 22 for said compressor and a condenser 23. A fitting '25 is cdnnected with the high-pressureside of the compressor 2l and by a pipe 26 with condenser coil 27.

Condenser coil 27 is connected by a pipe 28 which is connected with theheader of the pressure-reducing valve.

evaporator 20, which header may contain a float valve (not shown) or any suitable- Refrigerant is withdrawn from the evaporator 20 by the compressor 21 through a pipe 29. The condenser coil 27 is enclosed within a tank 30, adapted to be supplied with water through a pipe 31 and drained through a pipe 32.

Pipe 31 and a water inlet pipe 33 are con-C nected. with the fitting which. containsa valve adapted to control the flow of water to thecondenser tank 30.

Fitting 25 comprises a casting or body 35 including a nipple 36 by which said bo y is secured to the outlet of the compressor 21. The opening 37 of the nipple 36 communicommunicates with 1926. Serial at. 124,860.

cates with a chamber 38, and a nipple 39 i rice, I

.ANTHONY'T. s'rocx, or Darren; omo, assrenon 'ro rnnco-nenr commnr. or

provided on the opposite side of the casting passing from the compressor to the condenser coil 27 willpass through the 'chamber 38. A cage'40 islsecur'ed by screws 41 to the body 35, and" contains a metallic bellows '42secured to body 35 at 43 and having a non-collapsible extension 44 located within the chamber 38. "The bellows 42 is adapted to contain a volatile fluid which is intro duced through a tube 45' which extends through the bed 35. Pipe 45 is sealed at 45 after the be lows 42 has been charged withvolatile fluid. The upper end of the bellows 42 carries a stem- 47 which is screw- I threaded and adapted to be received by.'anut 48. The end of the cage 40 is threaded is secured to the pipe 26. Thus refrigerant 7 and cooperates with an adjusting nut .49. A

spring 5(r-surrounds the stem 47 and is interposed between the nut 49 and the top wall of the bellows 42. The nut 49 is adapted to be screwed inwardly or outwardly for regulating the resistance of the spring 50 to movement of the bellows .42.

The fitting'25 includes a body 52 which is attached tovthe. body 35 and includes a chamber 53 connected with the pipe 33 containin a ball'valve 54. A spring 55 tends norma y to maintain the valve 54 upon its vided-with a flexible wall 59. Afstem extends through the flexible wall 59 and passage 57, and, is adapted to engage the ball- ,valve 54. Stem 60 is adapted'to be moved inwardly by a lever 61 which is fulcrumed on' a pin 62 carried byears 63 formed upon the body 52. The opposite end of 7 lever 61 lies in the path of movement of the seat 56. Chamber 53 is connected by a pas sage 57 with a chamber 58 which is prosion of the bellows 42, will rotate the lever 61, and move valve. 54 from its seat 56. Body 52 is provided with a passage 65 which a passage 66 formed within the. body 35. Passage65 is connected with pipe 31. When the valve 5418 open, j

waterwill flow from pipe 33 through chamber 53, passage 57, chamber 58 and passages 65 and 66' and pipe 31 to the condenser 23.

passing to the condenser 23.

the water harging tube 45 extends through the Pas ore,

a pipe 29 exceeds a certain value, correspond-- contacts will be separated to Thecompressor 21 may ,be started. and

sto ped automatically by any suitable contro er so that a desired average temperature will be maintained in a cabinet WhlCh con- .Serial N 0. 642,368, filed May 30, 1923. This controller is illustrated diagrammatically at 70, and includes a snap switckhaving con-',

tacts 71 and 72 for controlling. the circuit of the motor 22, and a metal bellows [73.

having a movable end wall mechanically connected with the switch. The bellows.

73 is connected by a pipe 74 with the low pressure pipe 29. When the presure in ing to high temperature in the unit 20, the switch contacts 71 and 72 will be closed to cause the motor 22 to drive the compressor 21. When the pressure inpipe 29 falls below acertain low pressure, correspondin to a low temperature in theflunit20, j the switch stop the motor and compressor.

-When the compressor isoperating, the

relatively warm refrigerant which passes.

through the chamber 38 will'quickly heat the extension 44 of bellows 42, causing the fluid wlthin the bellows 42 to expand, wherew by the-stem 47 and nut 48 are moved out- I 38, and the relatively 0 erant I ceases.

wardly to open the valve 54. Water will then flow through pipe 33, valve 25 and pipe 31 ta the condenser chamber 30. When the compressor is stopped, relatively warm refrigerant ceases to flow through chamber cold water passing though the body35 to the condenser chamber 30 will quickly cool the charging tube 45, whereby the bellows will quickly contract and theball valve will then be forced against its seat 56 by the spring 55, to stop the flow of water. l

It is apparent from the foregoing description that arefrigerating apparatus has been provided which utilizes water for the condenser in an economical manner, because the water-is shut off promptly after the demand therefor ceases. By subjecting the temperature responsive mechanism controlling the Water valve 54 to the cooling ,action'of the Water flowing ,to the condenser, the valve will be closed promptly after flow of refrig- The tem erature at which the valve 54 opens can controlled by turnin the nut 49. When the nut 49 is screwed inwardly,

the stem 47 also will be moved inwardly'because the spring 50 is additionally com pressed. In order to maintain the desired clearance between nut 48 and lever'61, the nut 48 is" screwed outwardly. Conversely, when the nut 49 is screwed outwardly to re-. duce the compression of sprin 50, the stem 47 will move outwardly; and t e nut 48 may a refrigerant circulatory system having" means for circulating the refrigerant in said system and havin a condenser portion; a cooling medium circuit for said condenser port-ion; and means responsive to the temperature of the refrigerant and the medium .in said circuit for controlling the flow of said medium.

2. A refrigerating apparatus comprising means for circulatingthe refrigerant in said system and'havin a condenser portion; a cooling medium circuit for said condenser portion; and means for controlling the flow of medium in said circuit, said means including an expansible vessel containing a volatile fluid subjected to the temperature of the refrigerant in the system and the temperature ofcooling medium, an a valve operativel connected with said vessel.

3. A re rigerating apparatus including an evaporator, a condenser,-a compressor, conduits operatively connecting same; a cooling mediumcircuit for said condenser; and a valve responsive to the refrigerant temperature between the compressor and condenser and res onsive to the temperature of the coolin me ium.

4. A re igerating apparatus including an evaporator, a condenser, a compressor, conduits operatively connecting same; a cooling medium circuit for said condenser; and a valve responsive to the refrigerant temperature between the compressor and condenser and responsive to the temperature of the cooling mediumbefore said medium is-delivered to the condenser.

In testimony whereof I hereto aflix my signature.

-. 3 ANTHONY T..STOC1{.

a. refrigerant circulatory system having IOU 

